866329040 has 40 divisors (see below), whose sum is σ = 2101794048. Its totient is φ = 331464320.

The previous prime is 866329039. The next prime is 866329067. The reversal of 866329040 is 40923668.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 866328985 and 866329003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233576 + ... + 237255.

Almost surely, 2^866329040 is an apocalyptic number.

866329040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866329040 is an abundant number, since it is smaller than the sum of its proper divisors (1235465008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866329040 is a wasteful number, since it uses less digits than its factorization.

866329040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470867 (or 470861 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 866329040 is about 29433.4680253619. The cubic root of 866329040 is about 953.2956782797.

The spelling of 866329040 in words is "eight hundred sixty-six million, three hundred twenty-nine thousand, forty".